PDFOffice_Windows_exe/PDF Office/ViewModels/Dialog/HomePageToolsDialogs/HomePageBatchProcessing/HomePageWatermark/HomePageWatermarkDialogViewModel.cs

using ComPDFKit.PDFDocument;
using PDF_Office.CustomControl;
using PDF_Office.Model.Dialog.HomePageToolsDialogs.HomePageBatchProcessing;
using PDF_Office.Model;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Windows.Forms;
using PDF_Office.Helper;
using System.Windows;
using System.Data;
using ComPDFKitViewer.PdfViewer;
using Prism.Events;
using PDF_Office.EventAggregators;
using PDFSettings;
using PDF_Office.Model.EditTools.Watermark;
using ComPDFKit.PDFWatermark;
using Prism.Services.Dialogs;

namespace PDF_Office.ViewModels.Dialog.HomePageToolsDialogs.HomePageBatchProcessing.HomePageWatermark
{
    public class HomePageWatermarkDialogViewModel : BindableBase, INavigationAware
    {
        #region 参数和属性
        private List<string> fileNames;

        private CPDFDocument tempDocument;

        public string PageNumber = "";

        public IEventAggregator eventAggregator;
        public IRegionManager watermarkRegion;
        public IDialogService dialogs;

        private CPDFViewer PDFViewer;

        private CPDFWatermark watermark;

        public WatermarkInfo WatermarkInfo;

        private CPDFViewer CurrentPDFViewer;

        private ViewContentViewModel viewContentViewModel;

        public string TemplateListName = "HomePageWatermarkTemplateListBaseContent";
        public string CreateBaseName = "HomePageWatermarkCreateBaseContent";
        public string CreateModTextName = "HomePageWatermarkCreateTextContent";
        public string CreateModFileName = "HomePageWatermarkCreateFileContent";

        public string TemplateListModTextName = "HomePageWatermarkTemplateListTextContent";
        public string TemplateListModFileName = "HomePageWatermarkTemplateListFileContent";

        private string _watermarkSettingsRegionName;
        public string WatermarkSettingsRegionName
        {
            get { return _watermarkSettingsRegionName; }
            set { _watermarkSettingsRegionName = value; }
        }

        private Visibility _watermarkSettingsVisible = Visibility.Collapsed;
        public Visibility WatermarkSettingsVisible
        {
            get { return _watermarkSettingsVisible; }
            set { _watermarkSettingsVisible = value; }
        }

        private EnumTextOrFile _currentCreateMod;
        public EnumTextOrFile CurrentCreateMod
        {
            get { return _currentCreateMod; }
            set { _currentCreateMod = value; }
        }

        private EnumTextOrFile _currentTemplateListMod;
        public EnumTextOrFile CurrentTemplateListMod
        {
            get { return _currentTemplateListMod; }
            set { _currentTemplateListMod = value; }
        }

        public List<int> fileNamesView = new List<int>();

        private int fileNamesIndex = 0;

        private int FileNameNumber = 0;

        private string watermarkGridIsEnabled = "True";
        public string WatermarkGridIsEnabled
        {
            get
            {
                return watermarkGridIsEnabled;
            }
            set
            {
                SetProperty(ref watermarkGridIsEnabled, value);
            }
        }

        private string setWatermarkGridIsEnabled = "True";
        public string SetWatermarkGridIsEnabled
        {
            get
            {
                return setWatermarkGridIsEnabled;
            }
            set
            {
                SetProperty(ref setWatermarkGridIsEnabled, value);
            }
        }

        private DataTable pdfDataTable = new DataTable();
        public DataTable PDFDataTable
        {
            get { return pdfDataTable; }
            set
            {
                SetProperty(ref pdfDataTable, value);
            }
        }

        private DataTable pdfCurrentDataTable = new DataTable();
        public DataTable PDFCurrentDataTable
        {
            get { return pdfCurrentDataTable; }
            set
            {
                SetProperty(ref pdfCurrentDataTable, value);
            }
        }

        private string removeIsEnable = "False";
        public string RemoveIsEnable
        {
            get { return removeIsEnable; }
            set
            {
                SetProperty(ref removeIsEnable, value);
            }
        }

        private string selectFileName = "False";
        public string SelectFileName
        {
            get { return selectFileName; }
            set
            {
                SetProperty(ref selectFileName, value);
            }
        }

        private string watermarkRegionName;
        public string WatermarkRegionName
        {
            get
            {
                return watermarkRegionName;
            }
            set
            {
                SetProperty(ref watermarkRegionName, value);
            }
        }

        private Visibility watermarkVisible = Visibility.Collapsed;
        public Visibility WatermarkVisible
        {
            get { return watermarkVisible; }
            set { SetProperty(ref watermarkVisible, value); }
        }

        private Visibility addFileVisibility = Visibility.Hidden;
        public Visibility AddFileVisibility
        {
            get { return addFileVisibility; }
            set
            {
                SetProperty(ref addFileVisibility, value);
                RaisePropertyChanged();

            }
        }

        private string createGridSpan = "1";
        public string CreateGridSpan
        {
            get { return createGridSpan; }
            set
            {
                SetProperty(ref createGridSpan, value);
                RaisePropertyChanged();

            }
        }

        private Visibility createGridSpanVisibility = Visibility.Visible;
        public Visibility CreateGridSpanVisibility
        {
            get { return createGridSpanVisibility; }
            set
            {
                SetProperty(ref createGridSpanVisibility, value);
                RaisePropertyChanged();

            }
        }

        #endregion

        #region 委托声明
        public DelegateCommand ADDPDFCommand { get; set; }

        public DelegateCommand ADDOpenedPDFCommand { get; set; }

        public DelegateCommand RemovePDFFileCommand { get; set; }

        public DelegateCommand CreateCommand { get; set; }

        public DelegateCommand ADDPDFFilesCommand { get; set; }
        #endregion

        public string Unicode = null;

        public HomePageWatermarkDialogViewModel(IRegionManager watermarkRegion, IEventAggregator eventAggregator, IDialogService dialogs)
        {
            this.eventAggregator = eventAggregator;
            this.watermarkRegion = watermarkRegion;
            this.dialogs = dialogs;
            Unicode = Guid.NewGuid().ToString();
            WatermarkSettingsVisible = Visibility.Visible;
            PDFCurrentDataTable.Columns.Add("FilePageRangeText");
            PDFCurrentDataTable.Columns.Add("FilePageRangeSelectIndex");
            PDFCurrentDataTable.Columns.Add("IsEvenPageIsEnabled");
            PDFCurrentDataTable.Columns.Add("FileState");
            PDFDataTable.Columns.Add("FileName");
            PDFDataTable.Columns.Add("FilePageRangeText");
            PDFDataTable.Columns.Add("FilePageRangeSelectIndex");
            PDFDataTable.Columns.Add("IsEvenPageIsEnabled");
            PDFDataTable.Columns.Add("MaxPageRange");
            PDFDataTable.Columns.Add("FileSize");
            PDFDataTable.Columns.Add("FileState");
            ADDPDFCommand = new DelegateCommand(addpicture);
            ADDOpenedPDFCommand = new DelegateCommand(addOpenedPDFFiles);
            ADDPDFFilesCommand = new DelegateCommand(addpicturefiles);
            RemovePDFFileCommand = new DelegateCommand(removepdffile);
            CreateCommand = new DelegateCommand(create);
            WatermarkSettingsRegionName = Guid.NewGuid().ToString();
            eventAggregator.GetEvent<EnterTemplateListOrCreateEvent>().Subscribe(EnterTemplateListOrCreate, e => e.Unicode == Unicode);
            eventAggregator.GetEvent<SetCurrentCreateModEvent>().Subscribe(SetCurrentCreateMod, e => e.Unicode == Unicode);
            eventAggregator.GetEvent<SetCurrentTemplateListModEvent>().Subscribe(SetCurrentTemplateListMod, e => e.Unicode == Unicode);
            eventAggregator.GetEvent<CurrentWatermarkPDFViewerEvent>().Subscribe(CurrentWatermarkPDFViewer, e => e.Unicode == Unicode);
            eventAggregator.GetEvent<EditWatermarkTemplateItemEvent>().Subscribe(EditWatermarkTemplateItem, e => e.Unicode == Unicode);
        }
        #region 逻辑函数
        public void EnterTemplateListOrCreate(EnumTemplateListOrCreateUnicode enumTemplateListOrCreateunicode)
        {
            EnumTemplateListOrCreate enumTemplateListOrCreate = enumTemplateListOrCreateunicode.Status;
            if (enumTemplateListOrCreate == EnumTemplateListOrCreate.StatusTemplate)
            {
                CreateGridSpan = "1";
                CreateGridSpanVisibility = Visibility.Visible;
                EnterSelectedContent(TemplateListName);
            }
            else
            {
                CreateGridSpan = "2";
                CreateGridSpanVisibility = Visibility.Collapsed;
                EnterSelectedContent(CreateBaseName);
            }
        }

        public void EnterSelectedContent(string SelectedContentName)
        {
            NavigationParameters param = new NavigationParameters();
            param.Add(ParameterNames.PDFViewer, PDFViewer);
            param.Add("Unicode", Unicode);
            param.Add("ViewModel", this);
            if (SelectedContentName == TemplateListName)
            {
                param.Add("CurrentCreateModName", CurrentCreateMod);
            }
            else if (SelectedContentName == CreateBaseName)
            {
                param.Add("CurrentTemplateListModName", CurrentTemplateListMod);
            }
            watermarkRegion.RequestNavigate(WatermarkSettingsRegionName, SelectedContentName, param);
            WatermarkSettingsVisible = Visibility.Visible;
        }

        public void SetCurrentCreateMod(stringUnicode currentCreateModNameunicode)
        {
            string currentCreateModName = currentCreateModNameunicode.Status;
            if (currentCreateModName == CreateModTextName)
            {
                CurrentCreateMod = EnumTextOrFile.StatusText;
            }
            else if (currentCreateModName == CreateModFileName)
            {
                CurrentCreateMod = EnumTextOrFile.StatusFile;
            }
        }

        public void SetCurrentTemplateListMod(stringUnicode currentTemplateListModNameunicode)
        {
            string currentTemplateListModName = currentTemplateListModNameunicode.Status;
            if (currentTemplateListModName == TemplateListModTextName)
            {
                CurrentTemplateListMod = EnumTextOrFile.StatusText;
            }
            else if (currentTemplateListModName == TemplateListModFileName)
            {
                CurrentTemplateListMod = EnumTextOrFile.StatusFile;
            }
        }

        public void CurrentWatermarkPDFViewer(CPDFViewerUnicode cPDFViewerunicod)
        {
            CurrentPDFViewer = cPDFViewerunicod.Status;

        }

        public void EditWatermarkTemplateItem(WatermarkItemUnicode watermarkItemunicode)
        {
            WatermarkItem watermarkItem = watermarkItemunicode.Status;
            NavigationParameters param = new NavigationParameters();
            param.Add("Unicode", Unicode);
            param.Add(ParameterNames.PDFViewer, PDFViewer);
            param.Add("CurrentTemplateListModName", CurrentTemplateListMod);
            param.Add("WatermarkItem", watermarkItem);
            watermarkRegion.RequestNavigate(WatermarkSettingsRegionName, CreateBaseName, param);
            WatermarkSettingsVisible = Visibility.Visible;
            CreateGridSpan = "2";
            CreateGridSpanVisibility = Visibility.Collapsed;
        }

        private void create()
        {
            updateListview("wait");
            fileNamesIndex = 0;
            WatermarkGridIsEnabled = "False";
            foreach (var filename in fileNames)
            {
                FileInfo fileinfo = new FileInfo(filename);
                string OutputPath = fileinfo.DirectoryName;
                char[] enumerationSeparator = new char[] { ',' };
                char[] rangeSeparator = new char[] { '-' };
                List<int> PageIndexLists = new List<int>();
                CPDFDocument document = CPDFDocument.InitWithFilePath(filename);
                if (document == null )
                {
                    PDFDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                    PDFCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                    fileNamesIndex++;
                    continue;
                }
                if (document.IsLocked)
                {
                    DialogParameters value = new DialogParameters();
                    value.Add(ParameterNames.PDFDocument, document);
                    dialogs.ShowDialog(DialogNames.VerifyPassWordDialog, value, e =>
                    {
                        if (e.Result == ButtonResult.OK)
                        {
                            if (e.Parameters.ContainsKey(ParameterNames.PassWord) && e.Parameters.GetValue<string>(ParameterNames.PassWord) != null)
                            {
                                document.UnlockWithPassword(e.Parameters.GetValue<string>(ParameterNames.PassWord).ToString());
                            }
                        }
                    });

                    if (document.IsLocked)
                    {
                        //未成功解密文档时，释放Document对象，返回
                        PDFDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        PDFCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "error";
                        fileNamesIndex++;
                        continue;
                    }
                }
                CreateWatermark(document);
                document.WriteToFilePath(CommonHelper.CreateFilePath(filename + "_Watermark.pdf"));
                //if (!CommonHelper.GetPagesInRange(ref PageIndexLists, "1-" + document.PageCount.ToString(), document.PageCount, enumerationSeparator, rangeSeparator))
                //{ //TODO
                //    Trace.WriteLine("输入不对");
                //    MessageBoxEx.Show("输入不对");
                //    return;
                //}

                document.Release();
                PDFDataTable.Rows[fileNamesIndex]["FileState"] = "complete";
                PDFCurrentDataTable.Rows[fileNamesIndex]["FileState"] = "complete";
                fileNamesIndex++;
            }
            WatermarkGridIsEnabled = "True";
        }

        public void CreateWatermark(CPDFDocument document)
        {
            if (WatermarkInfo != null)
            {
                 document.DeleteWatermarks(); 

                if (WatermarkInfo.WatermarkType == C_Watermark_Type.WATERMARK_TYPE_TEXT)
                {
                    watermark = document.InitWatermark(C_Watermark_Type.WATERMARK_TYPE_TEXT);
                    watermark.SetText(WatermarkInfo.Text);
                    watermark.SetFontName(WatermarkInfo.FontName);
                    if (WatermarkInfo.IsRelativeScale)
                    {
                        watermark.SetFontSizeWithPercentage(WatermarkInfo.TextSize);
                    }
                    else
                    {
                        watermark.SetFontSize(WatermarkInfo.TextSize);
                    }
                    watermark.SetTextRGBColor(WatermarkInfo.TextColor);
                }
                else
                {

                    watermark = document.InitWatermark(C_Watermark_Type.WATERMARK_TYPE_IMG);
                    if (WatermarkInfo.ImageArray != null)
                    {
                        watermark.SetImage(WatermarkInfo.ImageArray, WatermarkInfo.ImageWidth, WatermarkInfo.ImageHeight);
                    }
                    watermark.SetScale(WatermarkInfo.ImageSize / 100);
                }
                watermark.SetRotation((float)((WatermarkInfo.Rotation / 180) * Math.PI));
                watermark.SetOpacity((byte)(((float)WatermarkInfo.Opacity / 100) * 255));
                watermark.SetFront(WatermarkInfo.IsFront);
                watermark.SetVertalign(WatermarkInfo.WatermarkVertalign);
                watermark.SetHorizalign(WatermarkInfo.WatermarkHorizalign);
                watermark.SetFullScreen(WatermarkInfo.Isfull);
                watermark.SetVertOffset(WatermarkInfo.VertOffset);
                watermark.SetHorizOffset(WatermarkInfo.HorizOffset);
                watermark.SetHorizontalSpacing(WatermarkInfo.HorizontalSpacing);
                watermark.SetVerticalSpacing(WatermarkInfo.VerticalSpacing);
                watermark.SetPages(getFilePageRange(document, PDFCurrentDataTable.Rows[fileNamesIndex]["FilePageRangeText"].ToString(), PDFCurrentDataTable.Rows[fileNamesIndex]["FilePageRangeSelectIndex"].ToString()));
                Trace.WriteLine("IsCreateWatermark: " + watermark.CreateWatermark());
                Trace.WriteLine("IsUpdateWatermark: " + watermark.UpdateWatermark());
            }
        }
        #endregion

        #region 批量处理逻辑函数
        /// <summary>
        /// 添加PDF文件
        /// </summary>
        private void addpicture()
        {
            FileNameNumber = fileNames.Count;
            System.Windows.Forms.OpenFileDialog dlg = new System.Windows.Forms.OpenFileDialog();
            dlg.Multiselect = true;
            dlg.Filter = "PDF|*.pdf;*.PDF;";
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                fileNames.AddRange(dlg.FileNames.ToList());
                RemoveExcess(ref fileNames);
                SetWatermarkGridIsEnabled = "True";
                AddFileVisibility = Visibility.Collapsed;
                updateListview("wait");
            }
        }

        public void addPDFFiles(string filename)
        {
            FileNameNumber = fileNames.Count;
            fileNames.Add(filename);
            RemoveExcess(ref fileNames);
            SetWatermarkGridIsEnabled = "True";
            AddFileVisibility = Visibility.Collapsed;
            updateListview("wait");
        }

        /// <summary>
        /// 添加已打开PDF文件
        /// </summary>
        public void addOpenedPDFFiles()
        {
            FileNameNumber = fileNames.Count;
            foreach (var filename in App.OpenedFileList)
            {
                fileNames.Add(filename);
            }
            RemoveExcess(ref fileNames);
            SetWatermarkGridIsEnabled = "True";
            AddFileVisibility = Visibility.Collapsed;
            updateListview("wait");
        }

        /// <summary>
        /// 删除重复的文件
        /// </summary>
        public void RemoveExcess(ref List<string> Filenames)
        {
            List<string> filenames = new List<string>();
            foreach (var fileName in Filenames)
            {
                if (!filenames.Contains(fileName))
                {
                    filenames.Add(fileName);
                }
            }
            Filenames.Clear();
            Filenames = filenames;
        }

        /// <summary>
        /// 添加PDF文件夹
        /// </summary>
        private void addpicturefiles()
        {
            FileNameNumber = fileNames.Count;
            FolderBrowserDialog dialog = new FolderBrowserDialog();
            dialog.Description = "请选择文件路径";
            if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {

                string foldPath = dialog.SelectedPath;
                var apps = System.IO.Directory.GetFiles(foldPath);
                foreach (string app in apps)
                {
                    var fi = new FileInfo(app);
                    if (fi.Extension == ".pdf" || fi.Extension == ".PDF")
                    {
                        fileNames.Add(app);
                    }
                }
                RemoveExcess(ref fileNames);
                updateListview("wait");
                SetWatermarkGridIsEnabled = "True";
                AddFileVisibility = Visibility.Collapsed;
            }

        }
        /// <summary>
        /// 更新listview显示
        /// state 状态显示字符串
        /// </summary>
        public void updateListview(string state)
        {
            updateCurrentListview();
            DataTable pdfdatatable = new DataTable();
            pdfdatatable.Columns.Add("FileName");
            pdfdatatable.Columns.Add("FilePageRangeText");
            pdfdatatable.Columns.Add("FilePageRangeSelectIndex");
            pdfdatatable.Columns.Add("IsEvenPageIsEnabled");
            pdfdatatable.Columns.Add("MaxPageRange");
            pdfdatatable.Columns.Add("FileSize");
            pdfdatatable.Columns.Add("FileState");
            int datatableindex = 0;
            List<int> PageIndexLists = new List<int>();
            foreach (var fileName in fileNames)
            {
                string file_all = fileName;
                FileInfo f = new FileInfo(file_all);
                string file_size = (((float)f.Length) / 1024).ToString() + " K";
                if (!isEvenPage(fileName) && PDFCurrentDataTable.Rows[datatableindex]["FilePageRangeSelectIndex"].ToString() == "2")
                {

                    PDFCurrentDataTable.Rows[datatableindex]["FilePageRangeSelectIndex"] = "0";
                }
                int pagecount = CPDFDocument.InitWithFilePath(fileName).PageCount;
                if (PDFCurrentDataTable.Rows[datatableindex]["FilePageRangeSelectIndex"].ToString() == "3" && !CommonHelper.GetPagesInRange(ref PageIndexLists, PDFCurrentDataTable.Rows[datatableindex]["FilePageRangeText"].ToString(), pagecount, new char[] { ',' }, new char[] { '-' }, true))
                {
                    PDFCurrentDataTable.Rows[datatableindex]["FilePageRangeSelectIndex"] = "0";
                }
                pdfdatatable.Rows.Add(f.Name, PDFCurrentDataTable.Rows[datatableindex]["FilePageRangeText"], PDFCurrentDataTable.Rows[datatableindex]["FilePageRangeSelectIndex"], isEvenPage(fileName), pagecount, file_size, PDFCurrentDataTable.Rows[datatableindex]["FileState"]);
                datatableindex++;
            }
            PDFDataTable = pdfdatatable;
            HomePageBatchProcessingDialogModel.FilePaths = fileNames;

        }

        /// <summary>
        /// 更新Currentlistview显示
        /// pagerangetext 自定义页面范围字符串  pagerangeselectindex combobox下拉索引（0全部页面 1奇数页 2偶数页 3自定义页面）isevenpageisenabled 偶数页状态 state 状态显示字符串
        /// </summary>
        public void updateCurrentListview(string pagerangetext = "1", string pagerangeselectindex = "0", bool isevenpageisenabled = true, string state = "wait")
        {
            if (fileNames.Count >= FileNameNumber)
            {
                for (int i = 0; fileNames.Count - FileNameNumber > i; i++)
                {
                    PDFCurrentDataTable.Rows.Add(pagerangetext, pagerangeselectindex, isevenpageisenabled, state);
                }
            }
            else
            {
                Reverseorder(ref fileNamesView);
                foreach (int filenamesview in fileNamesView)
                {
                    PDFCurrentDataTable.Rows.RemoveAt(filenamesview);
                }
            }
        }

        /// <summary>
        /// 更新Currentlistview显示
        /// pagerangetext 自定义页面范围字符串  pagerangeselectindex combobox下拉索引（0全部页面 1奇数页 2偶数页 3自定义页面）
        /// </summary>
        public void updateFilesPageRange(string pagerangetext = "1", string pagerangeselectindex = "0")
        {
            for (int i = 0; fileNames.Count > i; i++)
            {

                PDFDataTable.Rows[i]["FilePageRangeText"] = pagerangetext;
                PDFDataTable.Rows[i]["FilePageRangeSelectIndex"] = pagerangeselectindex;
                PDFCurrentDataTable.Rows[i]["FilePageRangeText"] = pagerangetext;
                PDFCurrentDataTable.Rows[i]["FilePageRangeSelectIndex"] = pagerangeselectindex;
            }
        }
        /// <summary>
        /// 获取文件列表单个文件对应的页码范围
        /// document 文档对象 pagerangetext 自定义页面范围字符串  pagerangeselectindex combobox下拉索引（0全部页面 1奇数页 2偶数页 3自定义页面）
        /// </summary>
        public string getFilePageRange(CPDFDocument document, string pagerangetext = "1", string pagerangeselectindex = "0")
        {
            string filePageRange = "1";
            EditToolsHelper.GetPageRange(int.Parse(pagerangeselectindex), document, ref filePageRange, pagerangetext);
            return filePageRange;
        }

        /// <summary>
        /// 判断是否关闭偶数页
        /// document 文档对象 ）
        /// </summary>
        public bool isEvenPage(string filename)
        {
            CPDFDocument document = CPDFDocument.InitWithFilePath(filename);
            bool isevenpage = false;
            if (document.PageCount > 1)
            {
                isevenpage = true;
            }
            document.Release();
            return isevenpage;
        }

        /// <summary>
        /// 逆序int类型集合
        /// </summary>
        public void Reverseorder(ref List<int> Numbers)
        {
            Numbers = Numbers.OrderBy(a => a).ToList();
            Numbers.Reverse();
        }

        /// <summary>
        /// 打开文件PDF
        /// </summary>
        public void openfiledialog()
        {

            foreach (int filenamesview in fileNamesView)
            {
                System.Diagnostics.Process.Start(fileNames[filenamesview]);
            }
        }

        /// <summary>
        /// 删除文件PDF
        /// </summary>
        public void removepdffile()
        {
            FileNameNumber = fileNames.Count;
            Reverseorder(ref fileNamesView);
            foreach (int filenamesview in fileNamesView)
            {
                //Trace.WriteLine(filenamesview);
                fileNames.Remove(fileNames[filenamesview]);
            }
            if (fileNames.Count < 1)
            {
                SetWatermarkGridIsEnabled = "False";
                AddFileVisibility = Visibility.Visible;
            }
            updateListview("wait");
        }

        public void removepdffile(int index)
        {
            PDFCurrentDataTable.Rows.RemoveAt(index);
            fileNames.Remove(fileNames[index]);

            if (fileNames.Count < 1)
            {
                SetWatermarkGridIsEnabled = "False";
                AddFileVisibility = Visibility.Visible;
            }

            updateListview("wait");
        }


        public void PDFFileCount()
        {
            if (fileNames.Count == 0)
            {
                SetWatermarkGridIsEnabled = "False";
                AddFileVisibility = Visibility.Visible;
            }
            else
            {
                SetWatermarkGridIsEnabled = "True";
                AddFileVisibility = Visibility.Collapsed;
            }
        }

        #endregion

        #region 构架行为
        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            List<string> filepath = new List<string>();
            navigationContext.Parameters.TryGetValue<ViewContentViewModel>(ParameterNames.ViewContentViewModel, out viewContentViewModel);
            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);
            
            navigationContext.Parameters.TryGetValue<List<string>>(ParameterNames.FilePath, out filepath);
            if (filepath != null)
            {
                CreateGridSpan = "1";
                CreateGridSpanVisibility = Visibility.Visible;
                EnterSelectedContent(TemplateListName);
                fileNames = filepath;
                PDFFileCount();
                updateListview("wait");
            }
        }


        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
        }
        #endregion
    }
}